In computer technology, a parser is called as a program which is a part of a compiler that receives the input in the form of sequential source program instructions. Interactive online commands, markup tags and breaks them up into parts for example like (objects), verbs (methods) and their attributes) later which can be managed by other programming like other components in a compiler.

A parser is a compiler or interpreter component that breaks data into smaller elements for easy translation into another language. A parser takes input in the form of a sequence of tokens or program instructions and usually builds a data structure in the form of a parse tree or an abstract syntax tree.